tracker/pt: don't busy loop when trying to get a frame

Reported-by: @MathijsG
Issue: #552

1 files changed, 3 insertions, 2 deletions

diff --git a/tracker-pt/camera.cpp b/tracker-pt/camera.cpp
index 220bcc8e..89854cc7 100644
--- a/tracker-pt/camera.cpp
+++ b/tracker-pt/camera.cpp
@@ -6,6 +6,7 @@
  */
 
 #include "camera.h"
+#include "compat/sleep.hpp"
 
 namespace impl {
 
@@ -124,8 +125,8 @@ DEFUN_WARN_UNUSED bool Camera::_get_frame(cv::Mat& frame)
 {
     if (cap && cap->isOpened())
     {
-        for (int i = 0; i < 100 && !cap->read(frame); i++)
-            ;;
+        for (int i = 0; i < 5 && !cap->read(frame); i++)
+            portable::sleep(100);
 
         if (frame.empty())
             return false;